Quote Originally Posted by pessimisaurus

Different dogs' nails grow at different rates.
Some need them trimmed every 2 weeks ...

It all depends on the dog.

... when the dog is standing still the nails should not hit the ground.

German Shepherds and Pit Bulls for example tend to have flatter feet -
so their nails are farther from the ground and tend to be longer.
Cinder & Smokey, are almost the same size (50# and 45#), they walk & run an almost
identical step for step ... and grow their nails at noticeably different rates!
Cinder hardly needs a "trim" at 2 weeks; while SmokeMutt - OMG!
Smokey grows a set of CLAWS in less than two week's time ... he sounds like
a tap dancer!

I'll easily trim TWICE as much off Smokey's nails as Cinder needs to shed for
similar "new sneaker" results.
I swear the boy eats "Nail Grow" supplements when I'm not looking!